Don't delay on the prep, the sooner you do it the better!
If the past has shown me anything it's that guests that choose to remove their lock extensions a month prior to having new one's installed have stronger natural locks to attach too. Spending that month extension-free means your natural locks get more time to shift on their own without all the extra weight dragging them down. Think of it as a nice vacation for your lock health -- where I absolutely love long luscious locks, I'm also a huge advocate for the long-term health of your hair -- trust me, you'll appreciate that break a little further down the road!